All docs
V20.1
20.2 (EAP/Beta)
20.1
19.2
19.1
The page you are viewing does not exist in version 19.1. This link will take you to the root page.
18.2
The page you are viewing does not exist in version 18.2. This link will take you to the root page.
18.1
The page you are viewing does not exist in version 18.1. This link will take you to the root page.
17.2
The page you are viewing does not exist in version 17.2. This link will take you to the root page.

ConnectionProviderSql.RegisterCustomAggregate(ICustomAggregateFormattable) Method

Registers a custom aggregate function to use in any CriteriaOperator-based criteria in your application.

Namespace: DevExpress.Xpo.DB

Assembly: DevExpress.Data.v20.1.dll

Declaration

public void RegisterCustomAggregate(
    ICustomAggregateFormattable customAggregate
)
Public Sub RegisterCustomAggregate(
    customAggregate As ICustomAggregateFormattable
)

Parameters

Name Type Description
customAggregate ICustomAggregateFormattable

A custom aggregate function to register.

Remarks

To search for a specific registered custom function, call the CriteriaOperator.GetCustomAggregate function.

NOTE
  • The RegisterCustomAggregate method throws an exception if the customAggregate has already been registered.
  • The customAggregate must have a unique Name property value. If you use standard aggregate names (Min, Max, Sum, Avg, Single, Exists, and Count), an exception is raised.
See Also